反应详情

温度

80 °C

1.23 g (7.5 mmol) of N-methyltrichloroacetamide were added to 2.27 g (5 mmol) of 3-(5-chloro-2-methoxybenzamido)-2,2-dimethyl-6-sulfamoyl-7-methoxychroman and 0.5 g (12.5 mmol) of finely powdered sodium hydroxide. After the mixture had been stirred at 80° C. for half an hour, it was introduced into ice/water, clarified with charcoal and acidified to pH 1. The precipitate was filtered off with suction, dried and recrystallized from ethanol/DMF. The product had a melting point of 248° C.

1. filtrationThe precipitate was filtered off with suction
2. customdried
3. customrecrystallized from ethanol/DMF